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                            <b>1.</b>
                        
                        认识爬虫
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                            <b>1.1.</b>
                        
                        HTTP
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                            <b>1.2.</b>
                        
                        requests
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                            <b>1.3.</b>
                        
                        初步爬虫小项目
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                            <b>2.</b>
                        
                        正则表达式
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                            <b>2.1.</b>
                        
                        正则表达式练习
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                            <b>2.2.</b>
                        
                        正则表达式之后的第一个项目
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                            <b>2.3.</b>
                        
                        正则表达式常用表
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                            <b>2.4.</b>
                        
                        正则表达式重点
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                            <b>2.5.</b>
                        
                        正则表达式常问问题
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        <li class="chapter " data-level="2.6" data-path="正则表达式/正则爬虫练习.html">
            
                
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                            <b>2.6.</b>
                        
                        正则爬虫项目练习
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        <li class="chapter " data-level="3" data-path="XPATH/xpath-in.html">
            
                
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                            <b>3.</b>
                        
                        XPATH
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        <li class="chapter " data-level="3.1" data-path="XPATH/Xpath.html">
            
                
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                            <b>3.1.</b>
                        
                        XPATH认识
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        <li class="chapter " data-level="3.2" data-path="XPATH/Xpath的代码例子.html">
            
                
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                            <b>3.2.</b>
                        
                        XPATH的代码例子
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        <li class="chapter " data-level="3.3" data-path="XPATH/xpath的爬虫练习.html">
            
                
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                            <b>3.3.</b>
                        
                        XPATH的爬虫练习
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        <li class="chapter " data-level="4" data-path="BeautifulSoup/BeautifulSoup.html">
            
                
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                            <b>4.</b>
                        
                        BeautifulSoup
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            <ul class="articles">
                
    
        <li class="chapter " data-level="4.1" data-path="BeautifulSoup/常用的css选择器.html">
            
                
                    <a href="../BeautifulSoup/常用的css选择器.html">
                
                        <i class="fa fa-check"></i>
                        
                            <b>4.1.</b>
                        
                        常用的css选择器
                    </a>
            
            
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        <li class="chapter " data-level="4.2" data-path="BeautifulSoup/BeautifulSoup4的各种例子.html">
            
                
                    <a href="../BeautifulSoup/BeautifulSoup4的各种例子.html">
                
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                            <b>4.2.</b>
                        
                        BeautifulSoup4的各种例子
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        <li class="chapter " data-level="5" data-path="代理/proxy.html">
            
                
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                            <b>5.</b>
                        
                        ip代理池项目
                    </a>
            
            
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        <li class="chapter " data-level="6" data-path="Selenium/Selenium.html">
            
                
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                            <b>6.</b>
                        
                        Selenium
                    </a>
            
            
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        <li class="chapter " data-level="7" data-path="进程线程协程/introduce.html">
            
                
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                            <b>7.</b>
                        
                        进程线程协程
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        <li class="chapter " data-level="7.1" data-path="进程线程协程/gevent.html">
            
                
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                            <b>7.1.</b>
                        
                        gevent
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        <li class="chapter " data-level="7.2" data-path="进程线程协程/green_let.html">
            
                
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                            <b>7.2.</b>
                        
                        green_let
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        <li class="chapter " data-level="7.3" data-path="进程线程协程/yield.html">
            
                
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                            <b>7.3.</b>
                        
                        yield
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        <li class="chapter " data-level="7.4" data-path="进程线程协程/multiprecessing.html">
            
                
                    <a href="../进程线程协程/multiprecessing.html">
                
                        <i class="fa fa-check"></i>
                        
                            <b>7.4.</b>
                        
                        multiprecessing
                    </a>
            
            
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        <li class="chapter " data-level="7.5" data-path="进程线程协程/threading.html">
            
                
                    <a href="../进程线程协程/threading.html">
                
                        <i class="fa fa-check"></i>
                        
                            <b>7.5.</b>
                        
                        threading
                    </a>
            
            
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            </ul>
            
        </li>
    
        <li class="chapter " data-level="8" data-path="scrapy框架/scrapy.html">
            
                
                    <a href="../scrapy框架/scrapy.html">
                
                        <i class="fa fa-check"></i>
                        
                            <b>8.</b>
                        
                        Scrapy
                    </a>
            
            
            <ul class="articles">
                
    
        <li class="chapter " data-level="8.1" data-path="scrapy框架/scrapy_setting.html">
            
                
                    <a href="../scrapy框架/scrapy_setting.html">
                
                        <i class="fa fa-check"></i>
                        
                            <b>8.1.</b>
                        
                        scrapy_setting
                    </a>
            
            
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        <li class="chapter " data-level="8.2" data-path="scrapy框架/模块作用.html">
            
                
                    <a href="../scrapy框架/模块作用.html">
                
                        <i class="fa fa-check"></i>
                        
                            <b>8.2.</b>
                        
                        模块作用
                    </a>
            
            
        </li>
    
        <li class="chapter " data-level="8.3" data-path="scrapy框架/19个中间件.html">
            
                
                    <a href="../scrapy框架/19个中间件.html">
                
                        <i class="fa fa-check"></i>
                        
                            <b>8.3.</b>
                        
                        19个中间件
                    </a>
            
            
        </li>
    

            </ul>
            
        </li>
    
        <li class="chapter " data-level="9" data-path="scrapy-redis分布式/scrapy-redis.html">
            
                
                    <a href="../scrapy-redis分布式/scrapy-redis.html">
                
                        <i class="fa fa-check"></i>
                        
                            <b>9.</b>
                        
                        scrapy-redis分布式
                    </a>
            
            
            <ul class="articles">
                
    
        <li class="chapter " data-level="9.1" data-path="scrapy-redis分布式/scrapy-redis的改造方法.html">
            
                
                    <a href="../scrapy-redis分布式/scrapy-redis的改造方法.html">
                
                        <i class="fa fa-check"></i>
                        
                            <b>9.1.</b>
                        
                        scrapy-redis的改造方法
                    </a>
            
            
        </li>
    

            </ul>
            
        </li>
    
        <li class="chapter " data-level="10" data-path="spider_projects/introduce.html">
            
                
                    <a href="../spider_projects/introduce.html">
                
                        <i class="fa fa-check"></i>
                        
                            <b>10.</b>
                        
                        spider_projects
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            <ul class="articles">
                
    
        <li class="chapter " data-level="10.1" data-path="spider_projects/使用代理在普通爬虫脚本下.html">
            
                
                    <a href="../spider_projects/使用代理在普通爬虫脚本下.html">
                
                        <i class="fa fa-check"></i>
                        
                            <b>10.1.</b>
                        
                        使用代理在普通爬虫脚本下
                    </a>
            
            
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        <li class="chapter " data-level="10.2" data-path="spider_projects/xpath爬取前程无忧的数据.html">
            
                
                    <a href="../spider_projects/xpath爬取前程无忧的数据.html">
                
                        <i class="fa fa-check"></i>
                        
                            <b>10.2.</b>
                        
                        xpath爬取前程无忧的数据
                    </a>
            
            
        </li>
    
        <li class="chapter " data-level="10.3" data-path="spider_projects/存储数据库的脚本.html">
            
                
                    <a href="../spider_projects/存储数据库的脚本.html">
                
                        <i class="fa fa-check"></i>
                        
                            <b>10.3.</b>
                        
                        存储数据库的脚本
                    </a>
            
            
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        <li class="chapter " data-level="10.4" data-path="spider_projects/weibo.html">
            
                
                    <a href="../spider_projects/weibo.html">
                
                        <i class="fa fa-check"></i>
                        
                            <b>10.4.</b>
                        
                        爬取央视新闻微博
                    </a>
            
            
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        <li class="chapter " data-level="10.5" data-path="spider_projects/weibo2.html">
            
                
                    <a href="../spider_projects/weibo2.html">
                
                        <i class="fa fa-check"></i>
                        
                            <b>10.5.</b>
                        
                        爬取明星的微博
                    </a>
            
            
        </li>
    
        <li class="chapter " data-level="10.6" data-path="spider_projects/liepin.html">
            
                
                    <a href="../spider_projects/liepin.html">
                
                        <i class="fa fa-check"></i>
                        
                            <b>10.6.</b>
                        
                        爬取猎聘的职位信息Crawl
                    </a>
            
            
        </li>
    
        <li class="chapter " data-level="10.7" data-path="spider_projects/zhilianRe.html">
            
                
                    <a href="../spider_projects/zhilianRe.html">
                
                        <i class="fa fa-check"></i>
                        
                            <b>10.7.</b>
                        
                        纯正则爬取智联的职位信息
                    </a>
            
            
        </li>
    
        <li class="chapter " data-level="10.8" data-path="spider_projects/setting.html">
            
                
                    <a href="../spider_projects/setting.html">
                
                        <i class="fa fa-check"></i>
                        
                            <b>10.8.</b>
                        
                        scrapy中的setting
                    </a>
            
            
        </li>
    
        <li class="chapter " data-level="10.9" data-path="spider_projects/items.html">
            
                
                    <a href="../spider_projects/items.html">
                
                        <i class="fa fa-check"></i>
                        
                            <b>10.9.</b>
                        
                        scrapy中的items
                    </a>
            
            
        </li>
    
        <li class="chapter " data-level="10.10" data-path="spider_projects/pipeline.html">
            
                
                    <a href="../spider_projects/pipeline.html">
                
                        <i class="fa fa-check"></i>
                        
                            <b>10.10.</b>
                        
                        scrapy中的pipeline
                    </a>
            
            
        </li>
    
        <li class="chapter " data-level="10.11" data-path="spider_projects/middlewares.html">
            
                
                    <a href="../spider_projects/middlewares.html">
                
                        <i class="fa fa-check"></i>
                        
                            <b>10.11.</b>
                        
                        scrapy中的middlewares
                    </a>
            
            
        </li>
    
        <li class="chapter " data-level="10.12" data-path="spider_projects/框架中的代码运行脚本.html">
            
                
                    <a href="../spider_projects/框架中的代码运行脚本.html">
                
                        <i class="fa fa-check"></i>
                        
                            <b>10.12.</b>
                        
                        框架中的代码运行脚本
                    </a>
            
            
        </li>
    

            </ul>
            
        </li>
    
        <li class="chapter " data-level="11" data-path="爬虫的面试题/面试题1-10.html">
            
                
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                        <i class="fa fa-check"></i>
                        
                            <b>11.</b>
                        
                        爬虫面试题
                    </a>
            
            
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                        <h2 id="&#x6B63;&#x5219;&#x8868;&#x8FBE;&#x5F0F;&#x7684;&#x51FD;&#x6570;&#x65B9;&#x6CD5;">&#x6B63;&#x5219;&#x8868;&#x8FBE;&#x5F0F;&#x7684;&#x51FD;&#x6570;&#x65B9;&#x6CD5;</h2>
<hr>
<pre><code class="lang-python"><span class="hljs-keyword">import</span> re
<span class="hljs-comment"># re.match()</span>

<span class="hljs-string">&quot;&#x4ECE;&#x5F00;&#x5934;&#x8FDB;&#x884C;&#x5339;&#x914D;&#xFF0C;&#x540E;&#x9762;&#x53EF;&#x4EE5;&#x6709;&#x591A;&#x4F59;&#x7684;&#x5B57;&#x7B26;&#xFF0C;&#x5339;&#x914D;&#x5230;&#x5C31;&#x8FD4;&#x56DE;&#xFF0C;&#x5339;&#x914D;&#x4E0D;&#x5230;&#x5C31;&#x8FD4;&#x56DE;none&quot;</span>
<span class="hljs-string">&apos;&#x7B2C;&#x4E00;&#x4E2A;&#x53C2;&#x6570;&#x5339;&#x914D;&#x9700;&#x8981;&#x7684;&#x6A21;&#x5F0F;pattern&#xFF0C;&#x7B2C;&#x4E8C;&#x4E2A;&#x53C2;&#x6570;&#x5C31;&#x662F;&#x9700;&#x8981;&#x53BB;&#x5339;&#x914D;&#x7684;&#x5B57;&#x7B26;&#x4E32;&apos;</span>

match_res=re.match(<span class="hljs-string">&apos;yaoshuaige&apos;</span>,<span class="hljs-string">&apos;yaoshuaige11111999&apos;</span>)
print(match_res)

<span class="hljs-comment"># re.search()</span>
<span class="hljs-string">&quot;&#x4E0D;&#x5FC5;&#x8981;&#x4ECE;&#x5F00;&#x59CB;&#x8FDB;&#x884C;&#x5339;&#x914D;&#xFF0C;&#x53EF;&#x4EE5;&#x5728;&#x5339;&#x914D;&#x7684;&#x4E0A;&#x7684;&#x5B57;&#x7B26;&#x4E32;&#x4E4B;&#x524D;&#x6709;&#x5176;&#x4ED6;&#x5B57;&#x7B26;&#xFF0C;&#x4E4B;&#x540E;&#x4E5F;&#x53EF;&#x4EE5;&#x6709;&#x5176;&#x4ED6;&#x5B57;&#x7B26;&quot;</span>
<span class="hljs-string">&apos;&#x7B2C;&#x4E00;&#x4E2A;&#x53C2;&#x6570;&#x5339;&#x914D;&#x9700;&#x8981;&#x7684;&#x6A21;&#x5F0F;pattern&#xFF0C;&#x7B2C;&#x4E8C;&#x4E2A;&#x53C2;&#x6570;&#x5C31;&#x662F;&#x9700;&#x8981;&#x53BB;&#x5339;&#x914D;&#x7684;&#x5B57;&#x7B26;&#x4E32;&apos;</span>
<span class="hljs-string">&apos;&#x5728;search&#x4E2D;&#x53EA;&#x4F1A;&#x5339;&#x914D;&#x51FA;&#x7B2C;&#x4E00;&#x6B21;&#x9047;&#x5230;&#x7684;&#x5B57;&#x7B26;&#x4E32;&apos;</span>

search_res=re.search(<span class="hljs-string">&apos;woshishuaige&apos;</span>,<span class="hljs-string">&apos;&#x6211;&#x662F;woshishuaige&#x4F60;&#x5462;&apos;</span>)
print(search_res)
print(search_res.group(<span class="hljs-number">0</span>))

<span class="hljs-comment"># complie &#x5185;&#x9700;&#x8981;&#x4F20;&#x5165;&#x7684;&#x662F;&#x6A21;&#x5F0F;pattern</span>
<span class="hljs-comment">#&#x4E3A;&#x4E86;&#x907F;&#x514D;&#x91CD;&#x590D;&#x7684;&#x751F;&#x6210;&#x7C7B;&#x3002;&#x51CF;&#x5C11;&#x5185;&#x5B58;&#x6D88;&#x8017;</span>
pat = re.compile(<span class="hljs-string">&apos;pattern&apos;</span>)
search_res = pat.search(<span class="hljs-string">&apos;safdytepatternhusydei&apos;</span>)
print(search_res)
search_res = pat.search(<span class="hljs-string">&apos;safdytepatternpattern&apos;</span>)
print(search_res)

<span class="hljs-comment">#findall</span>
<span class="hljs-comment">#&#x8F93;&#x5165;&#x7B2C;&#x4E00;&#x4E2A;&#x53C2;&#x6570;&#x662F;(pattern)&#xFF0C;&#x7B2C;&#x4E8C;&#x4E2A;&#x53C2;&#x6570;&#x662F;&#x9700;&#x8981;&#x5339;&#x914D;&#x7684;&#x5B57;&#x7B26;&#x4E32;</span>
<span class="hljs-comment">#&#x8F93;&#x51FA;&#xFF0C;&#x5C31;&#x662F;&#x5339;&#x914D;&#x5230;&#x7684;&#x5B57;&#x7B26;&#x4E32;&#x7684;&#x5217;&#x8868;</span>
f_res=re.findall(<span class="hljs-string">&apos;pattern&apos;</span>,<span class="hljs-string">&apos;safdytepatternpattern&apos;</span>)
print(f_res)

pat = re.compile(<span class="hljs-string">&apos;pattern&apos;</span>)
f_res = re.findall(<span class="hljs-string">&apos;pattern&apos;</span>, <span class="hljs-string">&apos;safdytepatternpattern&apos;</span>)
print(f_res)

<span class="hljs-comment">#&#x6682;&#x65F6;&#x7684;&#x7406;&#x89E3;&#x4E3A;&#x8FD4;&#x56DE;&#x7684;&#x662F;search&#x540E;&#x7684;&#x7ED3;&#x679C;&#x7684;&#x5217;&#x8868;&#xFF0C;&#x5339;&#x914D;&#x4E86;&#x4E24;&#x6B21;</span>
<span class="hljs-keyword">for</span> pat_str <span class="hljs-keyword">in</span> re.finditer(<span class="hljs-string">&apos;pattern&apos;</span>, <span class="hljs-string">&apos;safdytepatternpattern&apos;</span>):
    print(pat_str)

    <span class="hljs-string">&quot;&quot;&quot;
        &lt;_sre.SRE_Match object; span=(7, 14), match=&apos;pattern&apos;&gt;
        &lt;_sre.SRE_Match object; span=(14, 21), match=&apos;pattern&apos;&gt;

    &quot;&quot;&quot;</span>
<span class="hljs-comment">#&#x751F;&#x6210;&#x5668;&#x7684;&#x4F5C;&#x7528;&#xFF1A;</span>
<span class="hljs-comment"># &#x539F;&#x56E0;&#xFF1A; &#x56E0;&#x4E3A;&#x751F;&#x6210;&#x7684;&#x5217;&#x8868;&#x53EF;&#x80FD;&#x5F88;&#x5927;&#xFF0C;&#x9020;&#x6210;&#x5185;&#x5B58;&#x6D88;&#x8017;&#x592A;&#x5927;&#xFF0C;&#x53EF;&#x80FD;&#x5185;&#x5B58;&#x6EA2;&#x51FA;&#x3002;</span>
<span class="hljs-comment">#&#x89E3;&#x51B3;&#x529E;&#x6CD5;&#xFF1A;&#x6BCF;&#x751F;&#x6210;&#x4E00;&#x4E2A;&#x5BF9;&#x8C61;&#x5C31;&#x8FD4;&#x56DE;&#x4E00;&#x4E2A;&#x5BF9;&#x8C61;&#xFF0C;&#x518D;&#x751F;&#x6210;&#x4E0B;&#x4E00;&#x4E2A;&#x5BF9;&#x8C61;</span>

<span class="hljs-string">&quot;&quot;&quot;
&#x751F;&#x6210;&#x5668;&#xFF1A;&#x4F60;&#x672C;&#x6765;&#x6CA1;&#x6709;&#x5BF9;&#x8C61;&#xFF0C;&#x6BCF;&#x6B21;&#x751F;&#x6210;&#x4E00;&#x4E2A;&#x5BF9;&#x8C61;&#xFF0C;&#x5C31;&#x8FD4;&#x56DE;&#x4E00;&#x4E2A;&#x5BF9;&#x8C61;
&#x8FED;&#x4EE3;&#x5668;&#xFF1A;&#x4F60;&#x672C;&#x6765;&#x5C31;&#x6709;&#x5F88;&#x591A;&#x5BF9;&#x8C61;&#xFF0C;&#x6BCF;&#x6B21;&#x8FD4;&#x56DE;&#x4E00;&#x4E2A;&#x5BF9;&#x8C61;&#xFF0C;&#x5C31;&#x6709;&#x4E00;&#x4E2A;&#x6807;&#x5FD7;&#x7740;&#x4E0B;&#x4E00;&#x4E2A;&#x5BF9;&#x8C61;&#x662F;&#x4EC0;&#x4E48;&#x7684;&#x53D8;&#x91CF;
        __iter__, __next__
&quot;&quot;&quot;</span>
</code></pre>

                    
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